GB2001495A - Limiting audio signal peaks without distortion - Google Patents

Limiting audio signal peaks without distortion

Info

Publication number
GB2001495A
GB2001495A GB7830532A GB7830532A GB2001495A GB 2001495 A GB2001495 A GB 2001495A GB 7830532 A GB7830532 A GB 7830532A GB 7830532 A GB7830532 A GB 7830532A GB 2001495 A GB2001495 A GB 2001495A
Authority
GB
United Kingdom
Prior art keywords
distortion
clipper
input
audio signal
high frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7830532A
Other versions
GB2001495B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orban Associates Inc
Original Assignee
Orban Associates Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orban Associates Inc filed Critical Orban Associates Inc
Publication of GB2001495A publication Critical patent/GB2001495A/en
Application granted granted Critical
Publication of GB2001495B publication Critical patent/GB2001495B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/002—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general without controlling loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
    • H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05C—ELECTRIC CIRCUITS OR APPARATUS SPECIALLY DESIGNED FOR USE IN EQUIPMENT FOR KILLING, STUNNING, OR GUIDING LIVING BEINGS
    • H05C1/00—Circuits or apparatus for generating electric shock effects
    • H05C1/04—Circuits or apparatus for generating electric shock effects providing pulse voltages

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Insects & Arthropods (AREA)
  • Catching Or Destruction (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

A peak-limiting apparatus and method particularly useful in systems employing high frequency pre- emphasis to compensate for steep high frequency rolloff in a receiver, or the like. The apparatus and method is useful in standard AM broadcasting to maximize loudness without noticeable distortion. The psycho-acoustic phenomenon of "masking" is used to estimate maximum (non-audible) clipping. The distortion caused by a clipper is determined by subtracting a clipper's output from its input. This distortion is compared in a plurality of critical bands with the input to provide a gain control feedback signal for a variable gain stage connected to the input of the clipper. <IMAGE>
GB7830532A 1977-07-22 1978-07-20 Apparatus and method for peak-limiting audio frequency signals Expired GB2001495B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772733145 DE2733145C2 (en) 1977-07-22 1977-07-22 Electrical circuit arrangement for generating pulses for electric fence devices

Publications (2)

Publication Number Publication Date
GB2001495A true GB2001495A (en) 1979-01-31
GB2001495B GB2001495B (en) 1982-01-13

Family

ID=6014602

Family Applications (2)

Application Number Title Priority Date Filing Date
GB7830063A Expired GB2001497B (en) 1977-07-22 1978-07-17 Series-parallel coupled circuit for use for example with an electric fence
GB7830532A Expired GB2001495B (en) 1977-07-22 1978-07-20 Apparatus and method for peak-limiting audio frequency signals

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB7830063A Expired GB2001497B (en) 1977-07-22 1978-07-17 Series-parallel coupled circuit for use for example with an electric fence

Country Status (4)

Country Link
AU (1) AU523322B2 (en)
DE (1) DE2733145C2 (en)
FR (1) FR2398410A1 (en)
GB (2) GB2001497B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006053684A2 (en) * 2004-11-18 2006-05-26 Fachhochschule, Jena Signal processing unit and signal processing method
WO2009074945A1 (en) 2007-12-11 2009-06-18 Nxp B.V. Prevention of audio signal clipping

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009838C2 (en) * 1980-03-14 1982-09-23 Horizont Gerätewerk GmbH, 3540 Korbach Pulse generator
DE3229326A1 (en) * 1982-08-06 1984-02-09 BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau Circuit arrangement for generating and transmitting high-power pulses, and a method for its operation
AU592155B2 (en) * 1986-02-24 1990-01-04 Gallagher Electronics Limited Electric fence energiser
US4767999A (en) * 1986-11-12 1988-08-30 Megapulse, Inc. Method of and apparatus for radio-frequency generation in resonator tank circuits excited by sequential pulses of alternately opposite polarity
FR2673020B1 (en) * 1991-02-20 1995-05-19 Seroe Iesm SYSTEM FOR PROTECTING A FORBIDDEN SITE AGAINST INTRUSIONS, INCLUDING AN ELECTRIFIED FENCE.
DE4327572C1 (en) * 1993-08-17 1994-10-13 Horizont Geraetewerk Electrical fence apparatus
DE59901570D1 (en) 1998-09-29 2002-07-04 Siemens Ag PULSE GENERATOR FOR GENERATING A VOLTAGE PULSE AND RELATED METHOD

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE873620C (en) * 1949-09-21 1953-04-16 Ernst Hobbie Arrangement for the generation of electrical high voltage pulses for electric fences
DE844618C (en) * 1950-06-03 1952-07-21 Adolf Nissen Switching device for electric fences
DE859658C (en) * 1951-02-15 1952-12-15 Wilhelm Petersen Shock pulse generator for electrical enclosure systems u. Like. With impulse introduction through gas discharge tubes
DE1845058U (en) * 1961-10-02 1962-01-18 Heinz Dr Mueller ELASTIC FENCE.
DE1191488B (en) * 1962-06-19 1965-04-22 Adolf Salzer Transistor circuit for electric pasture fences with protection of the switching transistor
DE1413550A1 (en) * 1963-09-30 1969-01-09 Licentia Gmbh Resonant circuit inverter
US3427501A (en) * 1965-09-03 1969-02-11 Unitek Corp Capacitor linear charging power supply
CH477128A (en) * 1968-03-14 1969-08-15 Cie Generale D Electronique In Pulse generator circuit
CH542450A (en) * 1972-02-09 1973-09-30 Bbc Brown Boveri & Cie Method for reducing the effective earth capacitance of a cutting device operated together with a repetition pulse generator
US3849670A (en) * 1973-04-13 1974-11-19 Webster Electric Co Inc Scr commutation circuit for current pulse generators

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006053684A2 (en) * 2004-11-18 2006-05-26 Fachhochschule, Jena Signal processing unit and signal processing method
WO2006053684A3 (en) * 2004-11-18 2006-12-14 Fachhochschule Jena Signal processing unit and signal processing method
WO2009074945A1 (en) 2007-12-11 2009-06-18 Nxp B.V. Prevention of audio signal clipping

Also Published As

Publication number Publication date
FR2398410B1 (en) 1983-10-14
FR2398410A1 (en) 1979-02-16
AU523322B2 (en) 1982-07-22
DE2733145C2 (en) 1982-09-30
GB2001497B (en) 1982-04-07
GB2001495B (en) 1982-01-13
GB2001497A (en) 1979-01-31
AU3828678A (en) 1980-01-31
DE2733145A1 (en) 1979-02-08

Similar Documents

Publication Publication Date Title
US4208548A (en) Apparatus and method for peak-limiting audio frequency signals
ES8500530A1 (en) Analog and digital signal apparatus
AU1136295A (en) Power amplifier for mobile station
AU559786B2 (en) Hearing aid
AU561777B2 (en) Digital compander
MY109303A (en) High dynamic range modulation independent feed forward amplifier network
MY111535A (en) Mobile communication apparatus and method.
DE3462386D1 (en) Hearing aid
JPS5560343A (en) Receiver
GB2001495A (en) Limiting audio signal peaks without distortion
KR830000767B1 (en) Variable-angle multiple channel amplitude modulation receiver
ES2132971T3 (en) PROCEDURE FOR THE COMMON TRANSMISSION OF BROADCASTING SIGNALS AND / OR MODULATED DIGITAL AND ANALOGUE TELEVISION SIGNALS.
FI912250A0 (en) FOERMINSKNINGSTEKNIK AV SIDOPANELBRUS FOER ACTV.
EP0052415A3 (en) Frequency characteristic adjusting apparatus
MY115672A (en) Primary color video signal output circuit
KR970031383A (en) METHOD FOR MUTING A DIGITAL SIGNAL AND A DIGITAL SIGNAL RECORDING APPARATUS AND A DIGITAL SIGNAL PROCESSING APPARATUS EMPLOYING THE DIGITAL SIGNAL MUTING METHOD
JPS5753193A (en) Color amplitude control system
SU571920A1 (en) Controlled compandor
EP0393842A3 (en) Closed-loop audio attenuator
GB2000945A (en) Improvements relating to signal compressors and expanders
Torick et al. Amplitude Limiting in Systems with Frequency Dependent Overload Characteristics
KR960003084A (en) Tuner Input Level Control Circuit
JPS54152414A (en) Squelch system of fm mobile radio equipment
KR960009554B1 (en) Apparatus for generating surround channel &amp; mid-channel signal
JPS5735405A (en) Signal expanding device

Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19980705